From c6ae198283c3ed4bf2a138d376b5c219c6750cce Mon Sep 17 00:00:00 2001
From: tildearrow <tildearrow@protonmail.com>
Date: Tue, 21 Dec 2021 16:05:21 -0500
Subject: [PATCH] fix export crash :<

---
 src/engine/playback.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/engine/playback.cpp b/src/engine/playback.cpp
index 1feb9e2ee..0d23e3fa3 100644
--- a/src/engine/playback.cpp
+++ b/src/engine/playback.cpp
@@ -802,11 +802,13 @@ bool DivEngine::nextTick(bool noAccum) {
 }
 
 void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsigned int size) {
-  memset(out[0],0,size*sizeof(float));
-  memset(out[1],0,size*sizeof(float));
+  if (out!=NULL) {
+    memset(out[0],0,size*sizeof(float));
+    memset(out[1],0,size*sizeof(float));
+  }
 
   isBusy.lock();
-  if (sPreview.sample>=0 && sPreview.sample<(int)song.sample.size()) {
+  if (out!=NULL && sPreview.sample>=0 && sPreview.sample<(int)song.sample.size()) {
     DivSample* s=song.sample[sPreview.sample];
     size_t prevtotal=blip_clocks_needed(bb[2],size);